/*
 * jQuery RTE plugin 0.3 - create a rich text form for Mozilla, Opera, and Internet Explorer
 *
 * Copyright (c) 2007 Batiste Bieler
 * Distributed under the GPL (GPL-LICENSE.txt) licenses.
 */

// define the rte light plugin
jQuery.fn.rte = function(css_url, media_url) {

    if (document.designMode || document.contentEditable) {
        $(this).each(function() {
            var textarea = $(this);
            enableDesignMode(textarea);
        });
    }

    function formatText(iframe, command, option) {
        iframe.contentWindow.focus();
        try {
            iframe.contentWindow.document.execCommand(command, false, option);
        } catch(e) {
            console.log(e)
        }
        iframe.contentWindow.focus();
    }

    function tryEnableDesignMode(iframe, doc, callback) {
        try {
            iframe.contentWindow.document.open();
            iframe.contentWindow.document.write(doc);
            iframe.contentWindow.document.close();
        } catch(error) {
            console.log(error)
        }
        if (document.contentEditable) {
            iframe.contentWindow.document.designMode = "On";
            callback();
            return true;
        }
        else if (document.designMode != null) {
            try {
                iframe.contentWindow.document.designMode = "on";
                callback();
                return true;
            } catch (error) {
                console.log(error)
            }
        }
        setTimeout(function() {
            tryEnableDesignMode(iframe, doc, callback)
        }, 250);
        return false;
    }

    function enableDesignMode(textarea) {
        // need to be created this way
        var iframe = document.createElement("iframe");
        iframe.frameBorder = 0;
        iframe.frameMargin = 0;
        iframe.framePadding = 0;
        iframe.height = 200;
        if (textarea.attr('class'))
            iframe.className = textarea.attr('class');
        if (textarea.attr('id'))
            iframe.id = textarea.attr('id');
        if (textarea.attr('name'))
            iframe.title = textarea.attr('name');
        textarea.after(iframe);
        var css = "";
        if (css_url)
            var css = "<link type='text/css' rel='stylesheet' href='" + css_url + "' />"
        var content = textarea.val();
        // Mozilla need this to display caret
        if ($.trim(content) == '')
            content = '<br>';
        var doc = "<html><head>" + css + "</head><body class='frameBody'>" + content + "</body></html>";
        tryEnableDesignMode(iframe, doc, function() {
            $("#toolbar-" + iframe.title).remove();
            $(iframe).before(toolbar(iframe));
            textarea.remove();
        });
    }

    function disableDesignMode(iframe, submit) {
        var content = iframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;
        if (submit == true)
            var textarea = $('<input type="hidden" />');
        else
            var textarea = $('<textarea cols="40" rows="10"></textarea>');
        textarea.val(content);
        t = textarea.get(0);
        if (iframe.className)
            t.className = iframe.className;
        if (iframe.id)
            t.id = iframe.id;
        if (iframe.title)
            t.name = iframe.title;
        $(iframe).before(textarea);
        if (submit != true)
            $(iframe).remove();
        return textarea;
    }

    function toolbar(iframe) {

        var tb = $("<div class='rte-toolbar' id='toolbar-" + iframe.title + "'><div>\
            <p>\
                <select>\
                    <option value=''>Bloc style</option>\
                    <option value='p'>Paragraph</option>\
                    <option value='h3'>Title</option>\
                </select>\
            </p>\
            <p>\
                <a href='#' class='bold'><img src='" + media_url + "bold.gif' alt='bold' /></a>\
                <a href='#' class='italic'><img src='" + media_url + "italic.gif' alt='italic' /></a>\
            </p>\
            <p>\
                <a href='#' class='unorderedlist'><img src='" + media_url + "unordered.gif' alt='unordered list' /></a>\
                <a href='#' class='link'><img src='" + media_url + "link.png' alt='link' /></a>\
                <a href='#' class='image'><img src='" + media_url + "image.png' alt='image' /></a>\
                <a href='#' class='disable'><img src='" + media_url + "close.gif' alt='close rte' /></a>\
            </p></div></div>");
        $('select', tb).change(function() {
            var index = this.selectedIndex;
            if (index != 0) {
                var selected = this.options[index].value;
                formatText(iframe, "formatblock", '<' + selected + '>');
            }
        });
        $('.bold', tb).click(function() {
            formatText(iframe, 'bold');
            return false;
        });
        $('.italic', tb).click(function() {
            formatText(iframe, 'italic');
            return false;
        });
        $('.unorderedlist', tb).click(function() {
            formatText(iframe, 'insertunorderedlist');
            return false;
        });
        $('.link', tb).click(function() {
            var p = prompt("URL:");
            if (p)
                formatText(iframe, 'CreateLink', p);
            return false;
        });
        $('.image', tb).click(function() {
            var p = prompt("image URL:");
            if (p)
                formatText(iframe, 'InsertImage', p);
            return false;
        });
        $('.disable', tb).click(function() {
            var txt = disableDesignMode(iframe);
            var edm = $('<a href="#">Enable design mode</a>');
            tb.empty().append(edm);
            edm.click(function() {
                enableDesignMode(txt);
                return false;
            });
            return false;
        });
        $(iframe).parents('form').submit(function() {
            disableDesignMode(iframe, true);
        });
        var iframeDoc = $(iframe.contentWindow.document);

        var select = $('select', tb)[0];
        iframeDoc.mouseup(function() {
            setSelectedType(getSelectionElement(iframe), select);
            return true;
        });
        iframeDoc.keyup(function() {
            setSelectedType(getSelectionElement(iframe), select);
            var body = $('body', iframeDoc);
            if (body.scrollTop() > 0)
                iframe.height = Math.min(350, parseInt(iframe.height) + body.scrollTop());
            return true;
        });

        return tb;
    }

    function setSelectedType(node, select) {
        while (node.parentNode) {
            var nName = node.nodeName.toLowerCase();
            for (var i = 0; i < select.options.length; i++) {
                if (nName == select.options[i].value) {
                    select.selectedIndex = i;
                    return true;
                }
            }
            node = node.parentNode;
        }
        select.selectedIndex = 0;
        return true;
    }

    function getSelectionElement(iframe) {
        if (iframe.contentWindow.document.selection) {
            // IE selections
            selection = iframe.contentWindow.document.selection;
            range = selection.createRange();
            try {
                node = range.parentElement();
            }
            catch (e) {
                return false;
            }
        } else {
            // Mozilla selections
            try {
                selection = iframe.contentWindow.getSelection();
                range = selection.getRangeAt(0);
            }
            catch(e) {
                return false;
            }
            node = range.commonAncestorContainer;
        }
        return node;
    }
}